Alarm device.



J. E. PRIESTER.

ALARM DEVICE. APPLIUATION IILED FE'B.10, 191.4.

1,1 10,713, Y Patented Sept. 15, 1914.

d" I v IIVVVEIVTOR ,J 4% M -W IVEYS I UNITED srarus rna nn'r OFFICE.

Joni. rmns'rnn, or nanmsnune, TEXAS.

ALARM DEVICE.

'tively conne'cted with the steam whistle,

whereby when the water falls below a certain level in the boiler the mechanism will automatically operate to blow the whistle.

With the above and other objects in view, the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the, accompanying drawings, wherein Figure 1. is a side elevation of the device attached to" the boiler and operatively connected to the whistle. and Figs. 2 to9, inclusive, show detail views of'separate parts of the device.

Referring now more particularly to-the drawings, the numeral l-indicates the boiler havingthe usual steam dome 2, from which the steam pipe? leads. This pipe carries the steam whistle 4, of the usual and well known construction. The numeral 5 refers to a section of pipe, whose lower end has the elbow 6, which is inwardly turned and tapped through the side of the boiler below the-normal water level and communicates with the interior of the boiler. The upper end of the pipe 5 is closed by means of the cap 7 from which a short rigid arm 8 extends laterally; lhe numeral 9 refers to a spherical weight, which is slidably mounted on the lower end of the pipe 5,

so as to have a vertical movement on said pipe. Fixedto the pipe 5, above said weight is a hinge member 10, to which one end of the link 11 is pivoted. A rod 12 is adjustably secured at its upper end to the free end of the arm 8 and the lower end of said rod is pivoted to the outer end of link 11. De-

Specification ot Letters Patent,

pending from the outer end of said link and integral therewith is an arm 13, whose lower end has the hook 14. Extending upwardly fromthe weight 9'is the neck 15. whose upper end has an annular flange 16 and the hook 14 is provided to engage under said flange and hold the weight 9 elevated. A cable '17 is attached at itslower end to a the weight 9 and at itsupper end to the lever of the whistle 4.

When the water in theboiler 1 falls below. the orifice through which the elbow 6 istapped into the interior. of said boiler, steam. is permitted to enter'and pass through the elbow 6 into the pipe 5 and this steam being hot heats the pipe 5 and causes the same to lengthen, as indicated by dotted lines. in Fig. 1, in accordance with a well known physical law. the pipe 5 lengthens an upward pull is exerted on the rod 12 through the arm 8 and the outer end of the link 11 is therebey elevated, causing the lower end of the arm 13 and the book 14 to swing outwardly from the pipe 5, thus disengaging said hook from under the flange 16 and permitting the weight 9 to drop to the position indicated by dotted lines in Fig. 1. A downward pull is thus exerted .on the cable 17 and the whistle lever lowered, causing the whistle to blow in the well known manner. Alarm is thus given, indi- 'cating that the water in the boiler is below the normallevel.

What I claim is I In a device of the character described, the

combination with a boiler, of a steam line leading therefrom, a steam whistle carried by said line, a hollow pipe whose lower end is inwardly turned and tapped into the wall Patented Sept. 15, 1914.. Application filed February 10, 1914. Serial No. 817,898.

of said. boiler, a closure for the upper end of said pipe, an arm integral with and extending late-rally from said closure. a spherical weight slidably mounted upon said pipe, and having an annular flange upon its upper side, a cord one end of which is attached to said weight, and the other end of which is attached to the whistle lever, a rod whose upper end is adjustably secured to the free end of said arm, a hinge member adjustably secured on said pipe, a link, one endof which is pivoted to the lower end of said rod and the other end of whioh is pivname to this specification in the presence of oted 1to salild hinggmeniberlafnd a hook in]; two subscribing witnesses. tegra Wit and epen ing, rom said lin 1 and whose free end engages under said JOEL PRIESTER' 5 flange and normally holds the Weight in an. Witnesses:

elevated position. MAY MONTGOMERY, In testimony whereof I have signed -my HARRY NICHOLB.- 

